As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RIGHT ENGINE NOSE COWL ANTI-ICE VALVE OPEN LIGHT WAS ON BRIGHT WITH SWITCH ON. REDUCING ENGINE POWER CAUSED THE LIGHT TO DIM. INCREASING THE ENGINE POWER BACK UP CAUSED THE LIGHT TO BRIGHTEN. *S/D* REMOVED AND REPLACED NOSE COWL ANTI-ICE VALVE, OPS CHECK GOOD.